Process of and apparatus for treating felts and the like.



R. P. PERRY'& J. M. JACK.

PROCESS OF'AND APPARATUS FOR TREATING FELTS AND THE LIKE. APPLICATION FILED $EPT.29. 1911.

1,293,185. Patented Feb. 4, 1919.

A TTOR/VEY UNETEE STATES PATENT @FFKQE! an r. PERRY, or UPPER MONTCLAIR,

NEW JERSEY, AND JOHNM. JACK, 0F PEORIA,

ILLINOIS, ASSIGNORS TO THE BARRETT COMPANY, A CORPORATION OF WEST VIRGmA.

PROCESS OF AND APPARATUS FOR TREATING FELTS AND THE LIKE.

Specification of Letters Patent.

Patented Feb. 4, 191%.

Application filed September 29, 1917. Serial No. 193,965.

To all whom it may concern:

Be it known that we, RAY P. PERRY and Joint M. JACK, citizens of the United States, residing at Upper Montclair and Peoria, in the counties of Essex and Peoria and States of New Jersey and Illinois, respectively, have invented certain new and useful Improvements in Processes of and Apparatus for Treating Felts and the like, of which the following is a specification.

This invention relates to the manufacture of felts or papers adapted to be used in making so-called tarred or asphalt saturated felts especially felts of the character described and claimed in the co-pending application of R. P. Perry filed April 12, 1917, bearing Serial No. 161,670 and entitled Felts and processes of making the same.

In the manufacture of felts of the character described in the above entitled application, difiiculty is often experienced, especially when operating on a large or commercial scale due to the fact that the sheet of felt, containing as it does comminuted bituminous waterproofing material, preferably in filamentary form, scattered through out the mass of the same and, therefore, present in substantial quantities at the surfaces of the sheet, when passing over the series of heated drying rolls, adheres to the rolls which gather particles of comminuted bituminous material from the sheet. This not only renders the sheet less perfect, but also interferes with the drying operation since the adhering particles. of bituminous material prevent the sheet passing over the drying rolls from coming into intimate contact with said rolls, and said particles also prevent the heat from being conducted as efiiciently to the sheet to be dried as would be the case if such particles did not adhere to the drying rolls. c

The purpose of our invention is to provide a method and an apparatus whereby ,such undesirable adhesion of bituminous particles to the drying rolls of the usual paper-making machine is prevented 1n a manner that is at once simple and efficient, and does not-necessitate any substantial al- "teration of the usual paper-making plant.

Referring to the drawing wherein we have diagrammatically illustrated a dev ce embodying our invention and in which our process may be practised,

Figure 1 is an end elevation of a portion of thedrying mechanism with our invention applied thereto, and 4 t Fig. 2 is a detailed view of a modification of our invention.

Referring to the species illustrated in Fig. 1, 10 indlcates the sheet of felt containing comminuted fusible waterproofing material,

preferably in filamentary form, as described in the co-pending application referred to above. This sheet passes in the usual man- ,ner over the series of cylindrical or other shaped heated driers 11, 11,11. In order to prevent the undesirable adhesion of the particles of fusible waterproofing material present in the sheet to the surface of the driers as referred to above, we interpose between the sheet and the heated surfaces of the driers a thin film of a liquid, preferably of an oily nature, such, for example, as any liquid lubricating oil, such as etroleum oil, coal tar oil, or oil tar oil. hile this film may be interposed between the sheet and the driers by applying the same to the sheet, we prefer to apply this film to the driers since we have found that in thisway a more even film is produced and that the operation of the process is more uniform where the film is applied to the heated surfaces ofthe driers. While various means may be employed to effect the interposition of the film between the sheet and the heated surfaces of the driers, We prefer to use the means illustrated.

Such means comprise in the caseof those drying units the upper surface of which is traversed bythe sheet, supporting means 16 which support any suitably shaped receptacle 12 Within which the lubricating or similar oil 13 is contained. Dipping into the oil 13 within the receptacle 12 is the porous member 14 of a wick-like nature. In order to insure that the member 14 'will be constantly pressed with uniform pressure againstv the bottoms of those drying rolls 11 to which the members 14 are applied, we may interpose the coiled or other spring members 14' between the member 14 and the bottom of the container 12 so that in this way the members 14 will be pressed upwardly with uniform pressure against the bottom surfaces of the corresponding drying members 11.

In order to apply the film of liquid to those of the drying members 11 whose bot-v tom surfaces are traversed by the sheet 10,

' we provide the supporting members 18.

-lar liquid 19 and into which which support the receptacles or containers 17 WithinWhlCh contained the oil or s1m1- dips the porous wick-like member the bottom portion 21' 4 of which comes i'n'cont'act with the upper the portionsof the surfaces of the corresponding drying members 11.

The operation of the device .is ap arent fromthe above description. As the drying members 11 rotate in the directions indicated by the arrows, these-members will rub against orous wick-like members 14 and 21 whic are kept continually moist by means of the oil within the receptacles 12 and 17 respectively. In this way there is interposed between'the sheet 10 and driers 11 a thin film 'of'oil whichit is found substantially preof the fusible waterproofing particles of the sheet '10 to the surfaces of the heated drying rolls. Where such particles, as may occasionally happen, are very loosely incorporated in the s eet at the surface thereof, and, therefore, become separated from the sheet, while such particles may cling slightly to the surfaces of this adhesion is very 1 vents any adhesion cle in a certain sense floats onthe film of oil and its removal is a very easy matter. In order to eflect the removal of such particles of fusible waterproofing material that may adhere to the rolls 1 1, we provide the scraping means or doctors preferably of a porous wick-like nature for the removal of surplus oil and the few particles that may adhere to of the members 15 located so the roll. These scraping devices consist in the case of those of the rolls whose under surfaces are provided with the film ofliquid I as to clean off the. surfaces ofthe drying rolls at a point immediately before the roll is to be given a new film of liquid. In'the case of those of the drying units whose upper surfaces are provided with the film of oil or similar liquid, the cleansing means consist of the porous wick-like members 22 located in such a position with respect to the members tion for 21 that the member 22 effects the re movalof the surplus oil and of the few particles that may adhere to the driers 11 at a point immediately before the points at which the member 21 gives the driers 11 a new film of liquid. i

In Fig. 2 we have illustrated a modificaproviding the surfaces of the heated dryin rolls with the film of liquid. In this modifibation we employ a pipe '30 providedwith a seriesof efluidistantlyspacedperforaary size.. 011 or a similar liquid 32 is forced under a given pressure I from an suitable source of supply through the per orations 31into'the porous wicklike member 33 which completely surrounds plication of heated surfaces,

- waterproofing material in comminuted form,

surface.

the pipe 30. This filmproducing device is so located with respect tolthe driers 11 that the said driers will be pressed ainst the members 33 at those portions 0 the surfaces of the driers which are not covered by the sheet 10. f I

By the above means, especially when we emp oy a liquid ofan oily nature such as lubricating oil as,'f0r example, petroleum oil, coaltar oil or oil tar oil, we are enabled to effectively dry a sheet of the-nature describedin the co-pending application referred to above wlthout encountering any of the difliculties hitherto encountered in the manufacture of such a sheet on a commercial scale due to the adhesion to the surfaces of the heated driers of particles of fusible waterproofing material present in the sheet.

What we claim is:

1. In the process of drying, by the ap- 86 felts for roofing and the like having on at least one side thereof a substantial amount of fusible ads. herent waterproofing material .in comminuted form, the step of interposing a film 90 of liquid between the sheet and the surfaces to prevent the adhesion of said sheet or any portions of the same to the said heated suraces.

'2'. In the process of drying by the a lication of heated surfaces, felts for ro flng and the like having on at least one ide thereof a substantial amount of fusible adherent waterproofing material in filamentary form, the step of interposing an oily liquid 10. between the sheet and the surfaces to prevent the adhesion of said sheet or any portions of the same to the said heated surfaces.

3. In the process of drying, by the ap 1i.- cation of heated surfaces, felts for roo ng 1.. and the like having on at least one side there of a substantial amount. of fusible adherent the step of applying a film of liquid to the said surfaces to prevent the adhesion of said 11. sheet or. any portions of the same to the said surface. 4. In the process of drying, by the application of heated 'surfaces, felt for roofing and the like havingon at least one side thereof Ill a substantial amount of fusible adherent waterproofing material in comminuted form, the step of applying an oily liquidto the said surfaces to prevent the adhesion of said sheet or any portions of the same to the said J 5. The process of drying a sheet of felt having particles of fusible bituminous material distributeditherein, which comprises the steps ofpassing the sheet over a heated, moving, cylindrical surface at substantially the same speed as said surface moves, and simultaneously 'interposing a film of oily liquid between said sheet and said surface.

6. In a'paper-making machine a plurality 1Q masses ing substantially all of the said heated drying surfaces with films of lubricating oil, whereby such films will be interposed between the said surfaces and the material passing over said surfaces to be dried, and means for removing any surplus oil and such portions, if any, of the material as may adhere to the said surfaces.

In testimony whereof we afiix our signatures. v

RAY r. PERRY. JOHN M. JACK 

